> Code isn't laid out that way, with code, each statement starts on a new line which naturally limits line width.
No, it doesn't, especially for code that isn't written in a very basic simplistic imperative style. Expressions have no natural size limits (and statements, in languages that even have them, can generally each contain one or more expressions.)
Languages tend to develop conventional line width limits and conventions for where to prefer to break within expressions to achieve them, but there is no natural length limit to the length of a single statement.
No, it doesn't, especially for code that isn't written in a very basic simplistic imperative style. Expressions have no natural size limits (and statements, in languages that even have them, can generally each contain one or more expressions.)
Languages tend to develop conventional line width limits and conventions for where to prefer to break within expressions to achieve them, but there is no natural length limit to the length of a single statement.